Computational optimization of pressure wave reflection on the piston surface for single point autoignition gasoline engine with colliding pulsed supermulti-jets leading to noiseless-high compression and nearly-complete air-insulation

Aya Hosoi, Remi Konagaya, Sota Kawaguchi, Yasuhiro Sogabe, Yuya Yamashita, Ken Naitoh

研究成果: Conference article査読

抄録

A new engine concept based on pulsed supermulti-jets colliding at a small area around the chamber center was proposed in our previous research. It was expected to provide noiseless high compression ratio and nearly-complete air-insulation on chamber walls, leading to high thermal efficiency. In the previous reports, three-dimensional computations for the unsteady compressible Navier-Stokes equation were conducted, which were qualitative because of using regular grid method. This time, we develop a new numerical code in order to quantitatively simulate the compression level caused by the jets colliding with pulse. It is achieved by applying a staggered grid method to improve conservatibity of physical quantities at very high compression in combustion phenomena. Computations at a simple condition were fairly agreed with a theoretical value. Computational results obtained for a complex geometry of an engine by the new code had less error than one with previous codes. In addition, the results led us to an idea of new disposition of nozzles to achieve higher compression ratio. Furthermore, we tried to optimize the effect of pressure wave reflection on the piston surface by changing the movement of piston in order to achieve higher compression ratio leading to lower exhaust energy.

本文言語English
ジャーナルSAE Technical Papers
2019-April
April
DOI
出版ステータスPublished - 2019 4 2
イベントSAE World Congress Experience, WCX 2019 - Detroit, United States
継続期間: 2019 4 92019 4 11

ASJC Scopus subject areas

  • 自動車工学
  • 安全性、リスク、信頼性、品質管理
  • 汚染
  • 産業および生産工学

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